How Long Will $500,000 Last in Early Retirement? The Lean FIRE Answer
Straight-line math says $500k at $20k a year lasts 25 years. Real US market history says the median window lasted the full 40-year test, while the worst ran dry in 16.6 years. Here is how long $500,000 actually lasted at $20k, $30k, and $40k a year, and why part-time income moves the odds more than the balance does.
Five hundred thousand dollars is the number that sits right on the line. It is real money, enough to walk away from a job you are done with, and it is also not the seven-figure cushion the “can I retire” headlines assume. So the honest question is not just how long $500,000 lasts, but how long it lasts alone versus how long it lasts with a little income beside it. Those turn out to be very different stories.
Straight-line, $500,000 at $20,000 a year is exactly 25 years. But invested in US stocks across real history, that lean plan more often lasted the full 40 years we tested, and in the median case still had money at the end. The catch is the same one that governs every retirement: an unlucky start can undo the average, and at a small balance you have less room to absorb it.
The rate is the story, not the dollars
Here is the fact that makes $500,000 easier to reason about than it looks. In a constant real-spending backtest, what determines how long the money lasts is your withdrawal rate, not the size of the pile. Drawing $20,000 from $500,000 is a 4% rate, and it behaves in history exactly like drawing $40,000 from $1 million or $80,000 from $2 million. The portfolio path is the same; only the labels on the dollars change.
That is liberating, because it means the lever you control is the rate, and the fastest way to move the rate is not to save another $200,000, which takes years, but to cover part of your spending some other way starting on day one.
How we measured it
We took $500,000 in real (inflation-adjusted) dollars and walked it forward through every possible starting month in the bundled US stock series (Shiller, real total return with dividends reinvested, 1871 to 2025). Each month the balance grows by that month’s actual real return, then a fixed real withdrawal of one-twelfth of the annual spend comes out. When the balance hits zero, we record how many years it lasted. We ran a full 40-year test on every one of the 1,387 starting months with 40 years of data behind it, so every window is a complete, comparable outcome.
This is a straight, undisturbed backtest of a single all-US-stock portfolio, deliberately simpler than the simulator itself, which models US, international, and bond allocations and resamples history in blocks. Read the numbers below as an honest illustration of sequence risk on a lean, aggressive portfolio, not as a forecast.
The headline: at a low draw, history was kind
Here is how long $500,000 actually lasted at three spending levels, next to the straight-line answer everyone reaches for first.
| Annual spend | Straight-line math | Median history | % lasting 30+ years |
|---|---|---|---|
| $20,000 (4%) | 25.0 yr | 40+ yr | 97.8% |
| $30,000 (6%) | 16.7 yr | 40+ yr | 68.9% |
| $40,000 (8%) | 12.5 yr | 24.3 yr | 39.7% |
Illustrative only, not advice. $500,000 in real dollars, 100% US stocks (Shiller real total return), across 1,387 historical 40-year windows since 1871, computed by scripts/million-lasts-article-stats.mjs. "Median history" is the middle outcome; "40+ yr" means the median window still had money at the 40-year test cap. Straight-line = $500,000 divided by annual spend. Historical backtest of real starting points, not a forecast.
At $20,000 a year the two columns barely relate. Straight-line says 25 years; history usually said the money outlasted the whole 40-year test, and better than nine in ten starts cleared 30 years. That is the lean life on autopilot. The trouble is that $20,000 is genuinely lean, and the moment you want to spend more, the odds fall off a cliff: $40,000 a year is an 8% draw, and fewer than two in five windows survived three decades. On a small balance there is no middle ground where a high spend is also safe.
The downside: what an unlucky start looked like
You only retire once, and you do not get to average across a hundred timelines, so here is the other half: the unlucky-but-not-worst case (the 10th percentile) and the single worst starting month on record.
| Annual spend | Median | Unlucky (10th percentile) | Worst start on record |
|---|---|---|---|
| $20,000 (4%) | 40+ yr | 40+ yr | 16.6 yr (Oct 1929) |
| $30,000 (6%) | 40+ yr | 16.7 yr | 9.8 yr (Oct 1929) |
| $40,000 (8%) | 24.3 yr | 11.4 yr | 6.4 yr (Oct 1929) |
Illustrative only, not advice. Same 1,387 windows as above. "10th percentile" means one in ten historical starts lasted no longer than this; "40+ yr" means that outcome still had money at the 40-year cap. Every spend level's worst window began in October 1929. Historical backtest, not a forecast.
Every worst case shares one start date, and that is not a coincidence. It is the signature of sequence-of-returns risk: retiring into the 1929 crash meant selling shares into a collapse to fund groceries, permanently shrinking the base that later recoveries had to rebuild from. On a $500,000 balance that damage lands harder, because there is less cushion between a bad first decade and zero. The same crash arriving ten years in would have done a fraction of the harm.
Why $500,000 plus income is a different plan
This is where the lean number stops being scary. Because outcomes track the withdrawal rate, income you earn beside the portfolio is worth far more than its face value. Suppose your real life costs $35,000. Pull all of it from $500,000 and you are running a 7% draw, deep in the fragile zone where a meaningful share of histories ran dry. Now let part-time work, a Coast FIRE job, or a small business cover $15,000 of that $35,000. You withdraw only $20,000, a 4% rate, and you have moved from the bottom row of the table to the top one without adding a dollar to the balance.
The bridge to Social Security works the same way, from the other direction. A bridge is a short horizon, not a 40-year one. If your benefits and any pension will cover most of your spending after 62 to 70, the job of $500,000 is only to carry you across the gap. Even naive division covers a $40,000 lifestyle for 12.5 years with no growth at all, and history usually did better. You do not need $500,000 to last forever; you need it to last until the rest of your income shows up.
Test your own $500k plan against history
Start from a lean 4% draw, then see what a little part-time income would let you add before the odds change.
So can you retire on $500,000? Alone, at a genuinely lean spend, history says yes with room to spare, and at a comfortable spend it says be careful. Add part-time income or a Social Security bridge and the same $500,000 stops being a tightrope and starts being a plan. One caveat governs all of it: this is the record of US markets, which delivered an unusually strong century and a half, and the future is not required to repeat it. Treat these figures as a well-documented map of the past, and let your own plan lean a little more cautious than the luckiest version of history.
Other starting amounts: $1 million and $2 million.
Frequently asked
Can you retire early on $500,000?
On its own, $500,000 funds a lean retirement, not a lavish one. At the 4% guideline that is $20,000 a year, which in real US market history since 1871 lasted the full 40-year test in the median window and survived at least 30 years in 97.8% of starting points. Push spending to $40,000 a year (an 8% draw) and only 39.7% of windows reached 30 years. The number becomes far more workable the moment you add part-time income or a shorter bridge to Social Security, because both lower the rate you actually withdraw.
How does Barista FIRE change the math on $500,000?
Part-time income does not grow your balance, but it shrinks your withdrawal rate, which is what history actually rewards. If your life costs $35,000 and part-time work covers $15,000 of it, you draw only $20,000 from the portfolio. That is a 4% rate on $500,000, the zone that survived nearly every historical window, instead of the fragile 7% rate you would run pulling the whole $35,000 from savings. The dollars are identical; the odds are not.
Is $500,000 enough to bridge to Social Security?
Often, yes, because a bridge is a short horizon, not a 40-year one. Even by naive division, $500,000 covers $40,000 of spending for 12.5 years with no growth at all, and history usually stretched a bridge like that further. If Social Security and any pension will carry most of your spending after age 62 to 70, the job of $500,000 is to get you there, not to last forever, and a shorter horizon supports a higher safe draw.
What is the worst case for $500,000 in retirement?
In this backtest every spend level's worst outcome began in October 1929, on the eve of the Great Depression. At $20,000 a year that worst window lasted 16.6 years; at $40,000 a year it ran dry in 6.4 years. Retiring straight into a crash forces you to sell shares into the collapse to eat, which permanently shrinks the base later recoveries rebuild from. It is the clearest argument for keeping the early-years withdrawal low, which is exactly what part-time income does.